Germanium-incorporated lithium silicate composites as highly efficient low-temperature sorbents for CO2 capture

2018 ◽  
Vol 6 (17) ◽  
pp. 7913-7921 ◽  
Author(s):  
P. V. Subha ◽  
Balagopal N. Nair ◽  
V. Visakh ◽  
C. R. Sreerenjini ◽  
A. Peer Mohamed ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Low Temperature ◽  
Co2 Capture ◽  
Lithium Silicate ◽  
Absorption Kinetics ◽  
Carbon Dioxide Absorption ◽  
Temperature Range ◽  
Highly Efficient

Germanium-incorporated lithium silicate nanostructures with exceptional carbon dioxide absorption kinetics and capacity in the temperature range of 150–700 °C.

scholarly journals Synthesis of Na-Doped Lithium Metatitanate and Its Absorption for Carbon Dioxide

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Liu Zhirong ◽  
Zhang Huan ◽  
Wang Yun ◽  
Zhan Xinxing
Keyword(s):  
Carbon Dioxide ◽  
Solid State Reaction Method ◽  
Absorption Capacity ◽  
Absorption Kinetics ◽  
X Ray Diffraction ◽  
Carbon Dioxide Absorption ◽  
Reaction Method ◽  
X Ray ◽  
Xrd Patterns ◽  
The Relationship

Na-doped lithium metatitanate (Na-doped Li2TiO3) absorbent was doped with Na2CO3and lithium metatitanate (Li2TiO3) was prepared by a solid-state reaction method from mixture of TiO2and Li2CO3. The Na-doped lithium metatitanate was characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) and surface area. Carbon dioxide absorption on Na-doped lithium metatitanate was investigated using TG-DTA. The results reveal an increase of the CO2absorption capacity of the Na-doped materials with respect to pure Li2TiO3. XRD patterns of the doped samples suggest a limited substitution of Li by Na atoms within the Li2TiO3structure. The results of experimental and modeling work were summarized to better understand the relationship between the sorbent microstructure and carbon dioxide absorption kinetics.

Carbon dioxide absorption kinetics in potassium threonate

2008 ◽  
Vol 63 (13) ◽  
pp. 3493-3503 ◽  
Author(s):  
A.F. Portugal ◽  
F.D. Magalhães ◽  
A. Mendes
Keyword(s):  
Carbon Dioxide ◽  
Absorption Kinetics ◽  
Carbon Dioxide Absorption

scholarly journals Polymer Blends for Improved CO2 Capture Membranes

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1662
Author(s):  
Alireza Zare ◽  
Lorenza Perna ◽  
Adrianna Nogalska ◽  
Veronica Ambrogi ◽  
Pierfrancesco Cerruti ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Water Uptake ◽  
Co2 Capture ◽  
Potassium Hydroxide Solution ◽  
Cross Flow ◽  
Composite Membranes ◽  
Contact Angles ◽  
Carbon Dioxide Absorption ◽  
Water Contact ◽  
Flow Rates

We investigated the possibility of improving the performance of polysulfone (PSf) membranes to be used in carbon dioxide capture devices by blending PSf with a commercial polyethylene imine, Lupasol G20, previously modified with benzoyl chloride (mG20). Additive amount ranged between 2 and 20 wt %. Membranes based on these blends were prepared by phase inversion precipitation and exhibited different morphologies with respect to neat PSf. Surface roughness, water contact angles, and water uptake increased with mG20 content. Mass transfer coefficient was also increased for both N2 and CO2; however, this effect was more evident for carbon dioxide. Carbon dioxide absorption performance of composite membranes was evaluated for potassium hydroxide solution in a flat sheet membrane contactor (FSMC) in cross flow module at different liquid flow rates. We found that, at the lowest flow rate, membranes exhibit a very similar behaviour to neat PSf; nevertheless, significant differences can be found at higher flow rates. In particular, the membranes with 2 and 5 wt % additive behave more efficiently than neat PSf. In contrast, 10 and 20 wt % additive content has an adverse effect on CO2 capture when compared with neat PSf. In the former case, a combination of additive chemical affinity to CO2 and membrane porosity can be claimed; in the latter case, the remarkably higher wettability and water uptake could determine membrane clogging and consequent loss of efficiency in the capture device.

Oxydation lente du cétène en phase gazeuse. II. Réaction à "basses températures"

1971 ◽  
Vol 49 (2) ◽  
pp. 303-306 ◽  
Author(s):  
Pierre Michaud ◽  
Cyrias Oueixet
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Low Temperature ◽  
Reaction Scheme ◽  
Phase Gazeuse ◽  
Temperature Range ◽  
Slow Combustion ◽  
Methyl Hydroperoxide

The slow combustion of ketene was investigated in the low-temperature range 280–350 °C. It differs from the reaction at higher temperatures chiefly by the presence of peroxides (mostly hydroperoxides) and the absence of methane. The main products: formaldehyde, carbon monoxide, water, and carbon dioxide are the same in both cases. A reaction scheme is proposed, which involves degenerate branching through the decomposition of methyl hydroperoxide: CH3OOH = CH3O• + •OH.

Ideal–Gas Thermochemical Properties for Alkanolamine and Related Species Involved in Carbon Capture Applications

2020 ◽  
Author(s):  
Nayyereh hatefi ◽  
William Smith
Keyword(s):  
Heat Capacity ◽  
Electronic Structure ◽  
Co2 Capture ◽  
Carbon Capture ◽  
Ideal Gas ◽  
Thermochemical Properties ◽  
Temperature Range ◽  
Comparison Results ◽  
Electronic Structure Methods ◽  
Protonated Forms

<div>Ideal{gas thermochemical properties (enthalpy, entropy, Gibbs energy, and heat capacity, Cp) of 49 alkanolamines potentially suitable for CO2 capture applications and their carbamate and protonated forms were calculated using two high{order electronic structure methods, G4 and G3B3 (or G3//B3LYP). We also calculate for comparison results from the commonly used B3LYP/aug-cc-pVTZ method. This data is useful for the construction of molecular{based thermodynamic models of CO2 capture processes involving these species. The Cp data for each species over the temperature range 200 K{1500 K is presented as functions of temperature in the form of NASA seven-term polynomial expressions, permitting the set of thermochemical properties to be calculated over this temperature range. The accuracy of the G3B3 and G4 results is estimated to be 1 kcal/mol and the B3LYP/aug-cc-pVTZ results are of nferior quality..</div>

Thermally stable amine-functionalized silica sorbents using one-pot synthesis method for CO2 capture at low temperature

2020 ◽  
Vol 37 (12) ◽  
pp. 2317-2325
Author(s):  
Seong Bin Jo ◽  
Ho Jin Chae ◽  
Tae Young Kim ◽  
Jeom-In Baek ◽  
Dhanusuraman Ragupathy ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co2 Capture ◽  
Synthesis Method ◽  
Functionalized Silica ◽  
Thermally Stable ◽  
One Pot ◽  
One Pot Synthesis ◽  
Amine Functionalized
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